UV-curable adhesive attachment means and method for a cathode-ray tube-yoke combination

Abstract

A cathode-ray tube-yoke combination comprises a cathode-ray tube having a glass envelope and a yoke fixedly positioned on the envelope with a body of cured polymeric material. The novel composition of the polymeric material comprises a UV-curable adhesive and UV-transmissive particles of a suitable material in an amount sufficient to accelerate the curing of the adhesive. A method to accelerate the curing is also described.

What is claimed is: 
     
       1. In a combination including a cathode-ray tube having a glass envelope, a deflection yoke positioned on said envelope for producing a magnetic field, and a body of cured polymeric material attaching said yoke in a fixed position on said envelope, the improvement wherein said body of polymeric material comprises a composition including a UV curable adhesive and UV-transmissive particles of a suitable material in an amount sufficient to accelerate the curing of said adhesive.   
     
     
       2. The cathode-ray tube-yoke combination defined in claim 1 wherein said particles comprise up to 50 wt. % of said composition. 
     
     
       3. The cathode-ray tube-yoke combination defined in claim 2 wherein said particles comprise spheres ranging in diameter from 0.5 to 2.0 mm. 
     
     
       4. The cathode-ray tube-yoke combination defined in claim 3 wherein said spheres comprise 25 to 50 wt. % of said composition. 
     
     
       5. The cathode-ray tube-yoke combination defined in claim 4 wherein said spheres range in diameter from 1.5 to 2.0 mm. 
     
     
       6. The cathode-ray tube-yoke composition as defined in claim 5 wherein said spheres comprise 50 wt. % of said composition. 
     
     
       7. The cathode-ray tube-yoke combination defined in claim 4 wherein said spheres comprise UV-transmissive glass beads. 
     
     
       8. The cathode-ray tube-yoke combination defined in claim 7, wherein said glass beads are selected from the group consisting of 0080, 7052, 7720, 7740, 7750, 7770 and 9741 glass. 
     
     
       9. The cathode-ray tube-yoke combination as defined in claim 4 wherein said spheres comprise fused quartz. 
     
     
       10. The cathode-ray tube-yoke combination defined in claim 1 wherein said composition has a Shore A hardness within the range of 60 to 70. 
     
     
       11. A method for attaching a deflection yoke to a cathode-ray tube comprising the steps of: placing said deflection yoke in a desired position on a glass envelope of said cathode-ray tube using position means;   dispensing a body of polymeric material to attach said yoke on said envelope, said body of polymeric material comprising a composition including a UV-curable adhesive and UV-transmissive particles of a suitable material in an amount sufficient to accelerate the curing of said adhesive; and   illuminating said composition with UV light.